[Lustre-discuss] e2scan MDT back-up

[Brian J. Murrell]

On Wed, 2009-03-04 at 17:42 +0000, Daire Byrne wrote:
> Brian,

Hi Daire,

> I looked at zumastor. Although it didn't get any slower with extra snapshots
> it took quite a hit (~ x6 drop in writes) with just a single snapshot.

Ouch!

> Far more promising is the port of zumastor exceptions to the kernel and the work
> being done to add a generic shared exception store interface to device-mapper 
> (and ultimately LVM):
> 
>   https://www.redhat.com/archives/dm-devel/2009-February/msg00014.html

Cool.  Thanx for the pointer!

> It is a Redhat effort so it might actually be useful one day.

Heh.  I guess with this economy, only time will tell.

b.

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